[gary rabbitt]

HI, Just a thought,

I was rediong a Philco 20 and had the same issue. IIRC, I has to make sure that tha the end of the dial travel, the tuning cap was just above the shorting point.

So perhaps putting your dial on the extreme end of travel, then loosen the tuning cap shaft and raise it up just slightly, like a couple of mm, so it doesn't short.

I didn'lt find the exact location the plates would touch, that may be the best solurion, then isulate that point.